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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23

Plasmonics Key to Photon Upconversion

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A method to efficiently upconvert light combines plasmonic metals and semiconducting quantum wells to create a plasmon-powered device to boost wavelength frequency. The novel photon upconversion technique is mediated by hot carriers in plasmonic nanostructures. Hot holes and hot electrons generated via plasmon decay in illuminated metal nanoparticles are injected into an adjacent semiconductor quantum well, where they recombine to emit higher-energy photons. Researchers at Rice University were able to demonstrate photon upconversion from 2.4 to 2.8 eV using GaN/InGaN quantum wells...Read full article

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    Published: July 2017
    Glossary
    plasmonics
    Plasmonics is a field of science and technology that focuses on the interaction between electromagnetic radiation and free electrons in a metal or semiconductor at the nanoscale. Specifically, plasmonics deals with the collective oscillations of these free electrons, known as surface plasmons, which can confine and manipulate light on the nanometer scale. Surface plasmons are formed when incident photons couple with the conduction electrons at the interface between a metal or semiconductor...
    photon
    A quantum of electromagnetic energy of a single mode; i.e., a single wavelength, direction and polarization. As a unit of energy, each photon equals hn, h being Planck's constant and n, the frequency of the propagating electromagnetic wave. The momentum of the photon in the direction of propagation is hn/c, c being the speed of light.
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